Dictating machine with combined hand microphone and control means



p 1952 A. c. DE NAPOLI, JR 2,611,037

DICTATING MACHINE WITH COMBINED HAND MICROPHONE AND CONTROL MEANS Filed April 28, 1949 3 Sheets-Sheet 1 IN V EN TOR.

flmHo/vr C. 0s lVHPOLAJk.

-8 FITTORNEY p 1952 A. c. DE NAPOLI, JR 2,611,037

DICTATING MACHINE WITH COMBINED HAND MICROPHONE AND CONTROL MEANS Filed April 28, 1949 s Sheets-Sheet 2 Fig.4.- I 15.5

is h 49 3o 9 f 49 29 a INVENTOR.

30 HNTHONY C. DE NHPQLhJR.

FITTORNEY P 1952 A. c. DE NAP'OLI, JR

DICTATING MACHINE WITH COMBINED HAND MICROPHONE AND CONTROL MEANS 3 Sheets-Sheet 5 Filed April 28, 1949 RECORDING HMPLIFIER as PLHYBHCK AMPLIFIER I6 RECTIFIED FMC- 83 INPUT OUTPUT n a m:- D-.E Ii W H H)-\ c m M .xlll R Q f H w 3 U KR I m mm w 8 m & B W 3 m R H m m 1 mm 5. x mm 1 2 4 M8 "u\ ll X 5 Ly H hi m m 4 I INVENTOR. HN THON Y C. DE NHPOLI JR.

HTTORNEY (to be further described hereinafter) are preferably sensitive switches of the snap action micro type, and are adapted to be operated by means of an elongated actuating lever 28 which is so disposed outwardly of the retaining plate 26 as to serve as a'clos ure for the open sideof the channel-shaped handle portion |2.

The actuating lever 28 has a vertically slotted lower end 29 which is movably engaged with a hooked lower end 30 of the retaining plate 28 in:

such a manner as to retain the lower portion of the lever 23 in the handle portion l2, while permitting limited horizontal swinging andvertical sliding movement of the actuating'levenZS; The

a serrated concave surfaceportion' 33a which is adapted to be engaged by the users thumb,

The motor switch 23 is adapted to be operated by means of a lug 34 which is integrally formed upon'affcentral'portion of the inner surface of the actuating lever 28, and which is engageable with the switch'operating button 24. It will be noted that the lug 34 is of a'suihcient longitudinal extent as to be engageablewith the operating button 24 at any point in'the vertical sliding movement of the actuating lever '28,,so that the motor switch 23 may always be operated by pressing thelever 28 inwardly without regard to-the longitudinal position'of'said lever. t

In order to operate theselector switch 25, the upper'end'o'f the actuating lever 28 is provided with aninwardly-extending nose 35 which overhangs the operating button 26.' The actuating lever 28 is so proportioned that when said lever 28 is slid to its lowermost position, as sh'ownin Fig. 11, the switch-operating button 26 "will be depressed, while in all other positions of the actuating lever 28 thefnose 35 will be raised so as torelease the button 26.

Thus, it will'be seen that while the operator presses the actuating lever 28inwardly to maintain'the motor switch-operating button 24 de pressed, the selectorswi-tch operating; button 26 may be selectively pressed or released depending upon the longitudinal position of the lever 28. Inorder to limit outward movement of the actuating lever 26, and thus prevent its separation from the handle portion l2, provision is made of a downwardly-extending lip 36 which is integrally formed upon a hollowmicrophone cap 31 secured to'the head l3 by means of a pair of screws 38. i

The lip 36 is adapted to of the inwardly-extending nose 35 when the actuating lever 28 is in its outermost or ofi position, in which the motor switch operating button 24 and the selector switch operating button 26 are both released, as shown in Fig. 2. When the operator wishes to actuate the motor switch 23 without actuating the selector switch 25, he will merely depress the actuating le'ver28 inwardly against the force of the'switch button 24 so that the parts will assume the position shown in Fig. 9.

Provision is also made'of an outwardly-offset shoulder 36a-at the upper end of the lever 28, which may be engaged under'the lip 36 by sliding said lever upwardly to the position shown in Fig. 10, so that the motor switch operatingbntton engage the outer face.

24 will be held depressed without further attention on the part of the operator.

The head l3 of the body member I I is provided with a circular cavity 39 (Figs. 2 and 8), which joins the upper cavity l6 and contains a microphone'junit 4g of a dynamicg type wliich is adapted to servealso as at soundreproducer; and will be referred to hereinafter as a transducer unit.

'The transducer unit 40 is provided with an outer hollow microphone cap 31 and is seated upon a peripheral flange 4| which is disposed within the raised edge 42 oi the head l3 (Fig. 8).

The microphone cap 31 has a slotted central grille portion 46 to facilitate the passage of sound to and 'iromithe transducer unit 40, and is also provided with an upper window 44 to permit observation of aniindicator lamp 45 which is disposed in ,a transverse cavity 45 in the cap 31 above the transducer unit 48.

If desired, the microphone instrument |0 may also be provided with an anti-click motor switch'condenser. .41.; which is disposed in the upper. cavity .|6 above theselectori switch 25. The-instrumentlfl is also provided with a cable 48, which enters the instrument through a strainrelief device 49 secured in the apertured end wall i9, and which has'six conductors 58, 5|, 52, 53, 54, and 55, which will .be further described hereinafter in connection with Fig. 12. j

Theedgesof the lower and upper transverse partitions H, 18 arenotched in order to permit the conductors to extendupwardly to the motor switch'23, the selector-switch 25, the condenser 41, the-transducer unit 40;;and the indicator lamp 45, as "shown in -Fig. 3.- Bottom and side channels 56, 51' (Fig. 2) are also provided in the head l3 in order to permit a pairof the conductors to extend to the indicator lamp 45.

.Asshown in Fig. 12, the selector switch 25 is provided with a pair, of movableswitch arms 58, 59 which are urged against-respective contacts 68, 6|, by means of; a spring 62 and are adapted to be disengaged from said contacts when the operating button 26 is depressed.

.The selector switch-25 is also provided with a contact 63 which is-connected to the wire 52 and which is adapted to be engaged by the switch arm 58 when the operating button 26 is depressed. Thev transducer unit 48 is connectedto the wire 5| and'is also; connected to the movable switch arm 58 by means of a wire 64, whereby the transducer unit 46 may be switched selectively between the wire 58 and the wire 52.

The contact,6 of the selector switch 25 is connected to ;the,indica tor lamp, by means of a wire 65, said lamp being connected also to the wire 53 of the cable 48. The switch arm 58 is connected to the wire 54 by means of a wire 66, whereby a circuit may be completed from the wire 53 through thefln'dicator lamp 45 -to the wire 54. The motor switch 26 comprises a movable switch. arm til-which isadapted to engage a contact 68 when theoperating button 24 is depressed, but is normally urged away from said contact by means oi aspring 69. Y

Theswitch arm 6] and the contact 68 are com nected respectively to the wires 54, '55 of the cable 48 and the condenser 41 is connected across the Wires 54, by means of wires l0,'||.

J The microphone instrument I8 is adapted to be used in connection with a dictating machine 12 having a recording head 13 connected to the output of a recording amplifier 14, a playback head connected to the input of a playback amplifier 16, and a motor 11 for driving a turntable or other record operating means.

figurines? rectified'alternating current fromwny suitable' source. The wire 82"isadapted -to be conneoted to the w'ir'e 54, thus conneoting-I-the lindicator lamp 45 to the wire-BTthrough the selectonswitch 2'5' whenever theoperatingbuttonz 26 -ls released seas to permit the switch arm 59 110 engage the contact l the transducer unit 1 40 =beingconnected-to the 'recording amplifier H attire/same time. I

The circuit of Mt-he indicator :lamp A5 visicompleted by me'ans of :a wire oonnecting thes'wire 53 130 a switcharm-85iadapted to'fengage acontact 86-=w hichi'is eonnected-to'thewire 8'3'byimeans of a wire sl a A:mechaniealiconnectionfaa is .provided between the switch sarmi 8 5 and the recording' head l3, ?said connection: loeing so arranged as -to engage the switch arml:s5 with thezcontact8t whenithe' recording: head -13 sis-placed in operating position upon the surfaceizof' a record; and to disengage I; said :switch I :arm a from said contact when therecording head isr'rdisengagedilfromithe record. 'In normal: practice, i'the switch-1 arm: 85 may be actuated in conjunctionwithxrecording head operating mechanism, such as is shown in the patent to Lincoln Thompson, No. 2,250,242, issued July 22, l 1941; entitled Disk .Dictating iMachines.

In-order to provide power :forhthe turntablemotor' 11,. the dictating machine 12 is: providedwith a pair of wires 89,90 which are supplied wi'th alternatingcurrent from any suitable source, the wire 89 loeing connected-directly to one. side of theimotorv H. Theicircuit. is adapted .to be completed' through the motor; HT-by. means of a relay 9 I. having a contactlQ 2 which' isconnected toJthe motor I? by means of a wire 93, and a swingable relay arm 94 whichis connectedtothe wire .90.

'The relay-9i also includes alcoilfllli foroperating'stherelayuarnffi, saidc'oilibeing connected at one'side to. the wire B3,.and1at 'the other. side'to the wire 55 of .lthe microphone -l Diby means of a wire 96.- -"TI-'husTTtheir elayl9 L-is adapted-to. been ergized by the rectifidalternating currentecarridQ by the wiresv 8'2, 83, when the actuating lever 28 ofithei instrument I fl is pressed inwardly soias to engage the motorswitchermJH with the contact '68.

Operation 'Wh'enthe'instrum'ent l 0 and thedictating' machine '1 2arein conditionror-operation, the recordingnhead l3 will'abeoperatively -"engagedwith 1 a rec'ord'i-memher;whereupon the mechanieal' connection .882will close the switch arni 85 againstthe .contachSB so1that theindioatordamp 45 will be controlled bytmovemen-ts cof the sW'itch arm --6 I in theselectorswitohflfi. 1 When: the operator wishes to dictate; he will merely-press the-actuatinglever 28 inwardly do the: positionzish'own in Fig. 9, =in which the awopierating sbntton 24 ofr-lthe 'motor switch 23 i's depressed so-as to close-the'switeh arm G-T-againstthe contacted, and thus energize the relay 9 hand operate theturntable motor 1 l.

' In this position of the-actuatin leverizfi tFig. 9) the button 25 of the-selector sw-itch 25will, ;of course, he in areleased position sothat the spring 62 will hold the switch-arms '58- and fia against the contacts'tfl, and E I respectively; Thus the transducer unit40 wi11'be-operatively conneoted as a I microphone to the recording 1 amplifier 14,: and

will cause the recordingh'ead 1$=to=pr0duceasuitable '-sound track upon a recorid driven by the motor H. 1

'-The indicator lamp 45 wl-ll' alsd be llluminated, thus showing the operator-that the dictating machine isi-n condition circuit-wisetoreceive dictation. The dictating -machinei -wi ill, of course,

continueto-operate as a recorder as' long as the operator 3 holds the actuating lever 23 inwardly, in the position shown in'F'igi 'tl. r

However; if the operator should wish-td' be relieved of i the "necessity 0f" holding: the actuating lever 28 inwardly during-'the'recording operation, as forexampleduiing a prolonged period of dictation; or if he should desire -to= lay the instrument H3 down while dictating; he w ill merely slidezthe actuating lever 28' upwardly into *lthe .pos'ition shown in Fig. l0.

In this positionthe:shoulder tfia of therleveri s willbeengage'd under the'lipB'B; thus-holding ithe operating "button 24 in and maintaining :the switch arm t'l" of the motor switch flengagement with" the contact 68. Itswill be understood that the various elements of the apparatuszwill be in the same operating condition when the-actuating lever 28 is in the position "shown in Fig-10, as when said lever is in the:position 'shown "in Fig; 9,-exceptingonlythatEigL 9 'showsthe actuating lever 28 :as: itwould be manually held- :irr'recording -pos'ition, while-Fig. 10 shows said dever latched-in recording position.

If" the operator should desire-to :play baelr any portion of the: recorded materi'aLBhe i will hold the 'a'ctuating leven 28 inwardly whi-ie sliding: :it downwardly to the position shown: iin:Fig. :I1.

The-motor l1 will theni be maintained in operation inasmuchiasl the operating kbutton 2410fthe motor:-v switch 23 :will vhe d'epressed tinirthe same manneras during the recording operation. ill-Iowever, J the; inwardly-extending: cause 35 ofi the actuatingsleverln will:now:depressrthe operating button i w'1! 6. :of ith'exselector zswit'ch t'fi, thusr-transferring the switcharm.58iromlthe contactfi60 to thecontactfi3,and:connectingithe transdueerunit 4llias a reproducierzto the output ofi thesplayback amplifier 1B.

When: the transducer unit #15 ds connected-es a reproducer; the switch armzfi9;.will ;of:course;he disengaged .from the conta'ctze l, thus-.iextinguishing the indicator lamp 45 towarn thecoperator that the dictating machine 1 z is'not in condition forrr'ec'ording.

'Ihe' hand instrument to may be-adapted'i for use with a dictating' machine 91- having a single recording and playback amplifier 98 merely '-by modifyingthe electrical circuitswithin 1 said instrument as shown in Fig; 13.

' In" the modified form, the transducer unit--56 is connected directly -to a -pair=of-wires*99,-l-flil, leading from the-microphone instrument l-0 in the .cahle 48 ::and the 1 switch 1 arm St and i the COIIBaCtS'ESEJiH the seleotor 'switch 2 5 are respectively connectedilo wires: 10 I {11-02 in said." cable.

7.. The contacts 80, Ill and the switch arm 59 of the selector switch 25 are not used in the modified form, and it will be understood that the switch 25 may, if desired, be replaced with a switch having a single-pole single-throw structure.

The switch arm 61 of the motor switch 23 is connected to the wire I82 by means of a wire I03 within the instrument I0, while the contact 68 is connected to a wire I04 of the cable 48. One side of the indicator lamp 45 is connected to the wire I03 by means of a wire I85, while the other side of said lamp is connected to a wire I08 of the cable 48.

The anti-click condenser 41 is connected across the motor switch 23 by means of wires 10, 1|, which join the wires I03, I04, respectively.

In order to permit the operation of the recording and playback amplifier 98 to be controlled by the instrument [0, the dictating machine 91 is provided with a three-pole relay I01 having an actuating coil I08, one side of which is connected to the selector switch wire IOI by means of a wire I09. The other side of the actuating coil I08, and the other selector switch wire I02 are connected to a suitable source of rectified alternating current by means of a pair of wires III, H0, respectively, thus placing the relay I01 under the control of the selector switch 25.

The relay I01 is provided with a pair of movable relay arms H2, H3, which are adapted to be operated in unison by means of the actuating coil I08, and which are connected, respectively, by means of wires H8, H1, to an input transformer H4 and to an output transformer H of the amplifier 98.

When the relay coil I88 is inactive, the relay arm H2 will engage a relay contact H8 which is connected to the microphone wire 99 by means of a wire H9, thus connecting the transducer unit 40 as a microphone to the input transformer H4. At the same time, the relay arm H3 will engage a relay contact I28, which is connected to a recording head I2l by means of a wire I22, thus connecting said recording head to the output transformer H5.

The circuit through the transducer unit 40 and the input transformer H4 is completed through a conductor I23, which is connected to the microphone wire I00, and which has a branch I24 connected to the input transformer H4, while the circuit through the output transformer H5 and the recording head I2I is completed through the conductor I23 and branches I25, I28.

In order to energize the indicator lamp 45 when the transducer unit 40 is connected for operation as a microphone, the relay I01 is provided with a third movable relay arm I21, which is disposed in engagement with a relay contact I28 when the relay actuating coil I08 is inactive. The relay arm I21 is adapted to be connected to the wire III through a wire I21a, a switch arm 85', a contact 86, and a wire I29, while the relay contact I28 is connected to the lamp wire I06 by means of a wire I30, whereby the indicator lamp 45 may be connected with the source of rectified alternating current through the wires H0, III. A mechanical connection 38 is provided between the switch arm 85' and the recording head I2I, and it will be understood that said connection 88 will operate to hold the indicator lamp circuit open when the recording head I2I is not operatively engaged with the record.

The relay I01 also includes a pair of relay con tacts I3I, I32 which are adapted to be engaged by the relay arms H2, H3, respectively, when 8 the relay coil I08 is energized by means of the selector switch 25. The relay contacts I3I, I32 are connected respectively to a playback head I33 by means of a wire I34, and to the wire H9 by means of a branch wire I35.

A circuit is adapted to be completed through the playback head I33 by means of a branch wire I36 connecting said playback head to the conductor I23. Thus, when the relay coil I88 is energized, the transducer unit 40 will be connected as a reproducer to the output transformer H5, while the playback head I33 will be connected to the input transformer I I4.

The relay arm I21 is, of course, connected for simultaneous movement with the relay arms H2, H3, so that when the transducer unit 48 is connected for operation as a reproducer, the indicator lamp 45 will be extinguished, thus warning the operator that the dictating machine 91 is not in condition for-recording dictation.

The dictating machine 91 is also provided with a motor I31 for operating a turntable or other record-driving member, and a relay I38 which is connected to the motor switch 23 for controlling said motor. The motor I31 is adapted to be supplied with current from any suitable source by means of wires I39, I40, and is connected in series with a movable relay arm MI and a relay contact I42 in the relay I38. The contact I42 is connected to the motor by means of a wire I43, while the relay arm MI is connected to the wire I48. The relay I38 also comprises an actuatin coil I44, which is connected at one side to the wire III, and at its other side to the wire I84 by means of a wire I45. Thus, when the motor switch 23 is operated to close the circuit through the relay coil I44, the relay arm I4I will engage the contact I42 so as to energize the turntable motor I31.

Operation When the instrument I0 and the dictating machine 91 are in condition for operation, the operator may dictate after first pressing the actuating lever 28 inwardly to the position shown in Fig. 9.

The inward movement of the lever 28 will, of course, depress the operating button 24 so as to engage the motor switch arm 61 with the contact 68, thus energizing the motor relay I38, wahlich in turn will energize the turntable motor The selector switch arm 58 will be separated from the contact 63 so that the coil I08 of the relay I01 will be inactive, and the relay arms H2, H3 and I21 will be in the position shown in Fig. 13, wherein the indicator lamp 45 will be illuminated, the transducer unit 40 will be in operation as a microphone, and the recording head I2I will be actuated. If the operator should desire to continue dictation without the necessity for manually-holding the actuating lever 28, he will, of course, slide said lever upwardly into the latched position shown in Fig. 10.

If the operator should now desire to play back any portion of the recorded material, he will slide the actuating lever 28 downwardly to the position shown in Fig. 11, while holding it pressed inwardly, whereupon the selector switch button 28 will be depressed so as to engage the switch arm 58 with the contact 63 and thus energize the relay coil I08. This will result in a downward movement of the relay arms H2, H3, thus connecting the transducer unit 40 as a reproducer, and placing the playback head I33 in operation.

beseparated 1f uishing; the i operator .-,tha-.t ,1 he sdictatinggmachineis, not in conditiontoreseive dictation.

&'9 simultaneously with the downward movement .of-thezrelay arms: 1 12,, 113,, the; relay arm, 1:21 will omlthercontact 2:8,- thus :extini'cator iemp fl and warnin the While there havelzbeen ;disclcsed-;pin this; speciincludes all the modifications and embodimentscoming withinsthescope-of the following claims.

Having thus fully described the invention, what is claimed aswnem and for which it is desired to secure Letters Ratent, is:

1. In a phonographic apparatus, a dictating machine having ,a recording. amplifier, a p back amplifier, and a record'driving motor; a hand control instrumentxconnected tosaid dic tating .machine by .a. ,cable, said instrument fhavi-ng... a. transducer un hnpperable .either to .changepsound .energy ..to.:s,ound Emodulatedlelec- ,trieal. energy onto. changeisound' IIlOlilllIEtllEid'filGC- trical energy .to, sound .energy,. .a selector switch for connecting said transducer unit selectively to the input of said recording amplifier or to the output of said playback amplifier, a motor switch for controlling said motor, and a single manually-operable lever for actuating both of said switches.

2. In a phonographic apparatus, a dictating machine having a recording amplifier, a playback amplifier, and electrical means for rotating a sound record, a hand control instrument connected to said dictating machine by a cable, said instrument having a transducer unit, operable either to change sound energy to sound modulated electrical energy or to change sound modulated electrical energy to sound energy, a selector switch for connecting said transducer unit selectively to the input of said recording amplifier or to the output of said playback amplifier, a switch for controlling said means, an indicator lamp, and means comprising a switch arm connected in said selector switch for energizing said indicator lamp.

3. In a phonographic apparatus, a dictating machine having an amplifier and a record driving motor, a hand control instrument connected to said dictating machine by a cable, said instrument having a transducer unit, operable either to change sound energy to sound modulated electrical energy or to change sound modulated electrical energy to sound energy, a selector switch, a motor switch for controlling said motor, and a common lever for actuating said switches, and means for connecting said transducer unit selectively to the output or to the input of said amplifier comprising a relay having a coil in circuit with said selector switch.

4. The invention as defined in claim 3, including an indicator lamp in said control instrument, and means including a switch arm in said relay for energizing said indicator lamp.

5. In a phonographic apparatus, a dictating machine comprising record driving means, recording mean comprisinga recording head movable into and out or" operating position with respect to a sound record, and playback means, including circuits extending outwardly of said machine to a portable control instrument having an indicator lamp, said circuits having within said instrument a switch for operating; I .saidrecord dri-uingmeans, mean fonenrgizing said lamp,

a selector switch for..nperating. either-l said re- .cording means :01? said playback :means, means connected -to;.-,said selector -;s.witch for energizing said indicator: lam-p whensaidrecording means is, in operatm onditionand. incapacitating said Ylamp when said. recording-head-,isininoperative position with respect to said record.

.6. In ,a nhonoerehhica paratus, a portable hand microphone-instrument; having. a; trans- .ducer unit, operableeitherr-to chan e sound en- .ergy to sound modulated electrical --energ y .or to change. sound". modulated electrical energy to sound energy; alongitudinally slidable Land inwardly swingableeactuating lever, a selector ltionzof .saidselectcir switch jfor .operatively con- -.necting,said transducer unit .selcctive1y -to said playback head or. to. zsaid-,recordin head, and means :responsiv the Operation of said-motor switch for energizing-said motor, wherehy selective operation oi ,saidrecording and playback heads and operationoi satiric-motor may-be. controlled solely by .movement --.o.f; said, actuatin lever.

'7. The invention as defined in claim6, wherein said microphone instrument includes an indicator lamp, and said phonographic apparatus includes means depending upon an operative condition of said recording head for energizing said lamp.

8. In a dictating machine, an amplifier, a recording head, a playback head, a pair of transducer terminals, a pair of selector switch terminals, and a relay comprising switch arms for selectively connecting said transducer terminals to the input of said amplifier and said recording head to the output of said amplifier, or connecting said transducer terminals to the output of said amplifier and said playback head to the input of said amplifier, said relay having an actuating coil connected to said selector switch terminal.

9. In a disk record dictating machine, a recording amplifier, a playback amplifier, a recording head connected to the output circuit of said recording amplifier, a playback head connected to the input circuit of said playback amplifier, a disk record turntable motor, a transducer operable either as a microphone or a loudspeaker, a first circuit means interconnecting said transducer with the input circuit of said recording amplifier, a normally closed switch in said first circuit, a second circuit means interconnecting said transducer with the output circuit of said playback amplifier, a normally open switch in said second circuit, an energizing circuit means for said turntable motor, a normally open motor switch in said energizing circuit means, and a manually controllable lever operative selectively at a first position to close said motor switch and at a second position to simultaneously open said normally closed switch, close said normally open switch, and close said motor switch.

10. The invention as defined in claim 9 including a normally open indicator switch, mechanical means interconnecting said recording head and said indicator switch operative to close said indicator switch when said recording head is in recording position on a disk record, an indicator lamp, a source of electrical power for energizing said recording and playback amplifiers, an energizing circuit for said lamp controlled by said source of electrical power, a normally closed indicator switch in said lamp energizing circuit, and means operable to open said normally closed indicator switch upon operation of said manually controlled lever at its second position.

11. In a disk record dictating machine, a, combination recording and playback amplifier, a recording head, a Playback head, a disk record turntable motor, a transducer operable either as a microphone or a loudspeaker, circuit means interconnecting said recording head, playback head, amplifier, and transducer operable selectively either to record through said .transducer, amplifier, and recording head, or play back through said playback head, amplifier, and transducer, relay means to control said selective interconnecting circuit means, an energizing circuit for said relay means, a first normally open switch in said energizing circuit, an energizing circuit for said turntable motor, a second normally open switch in said motor energizing circuit, and a manually controllable lever operable selectively at a first position to close said second normally open switch and at a second position to simultaneously close respectively said first and second normally open switches.

12. The invention as defined in claim 11 including a normally open indicator switch, mechanical means interconnecting aid recording head and said indicator switch operative to close said indicator switch when said recording head is in recording position on a disk record, an indicator lamp, a source of electrical power for energizing said combination recording and playback amplifier, an energizing circuit for said lamp controlled by said source of electrical power, a normally closed indicator switch in said lamp energizing circuit, and means operable to open said normally closed indicator switch upon operation of said manually controlled lever at its second position.

ANTHONY C. DE NAPOLI, JR.

- REFERENCES CITED The following references are of record in the 

